Launched in 2014, the A330neo is a next-generation development of the airframer's long-time workhorse A330ceo wide-body twinjet. However, the A330neo has been beset by delays concerning its Rolls-Royce engines and overshadowed by its flashier carbon composite sibling, the A350XWB.

This fall, the Airbus A330-900neo is finally expected to enter service this fall with launch customer TAP Air Portugal.

David Neeleman. David Slotnick/Business Insider So why has Portugal's national airline gone with the A330neo instead of the A350 or Boeing Dreamliner?

"We were already kind of with Airbus so it's harder to make the switch," the JetBlue founder told us in a recent interview.

TAP currently operates an all-Airbus fleet headlined by the A320 family and the A330ceo.

"Airbus is really good at cockpit commonality, so when we go to train a pilot between an A320 and an A330, it's a pretty easy step up," he added.

TAP's A330neo economy cabin. Benjamin Zhang/Business Insider That effectively put the Boeing Dreamliner out of contention. But what about the A350?

"The A350 is a good airplane, but it's kind of too much airplane for us," Neeleman said. "One of the advantages of the A350 is its range. You can go 16 or 17 hours on and we didn't need that range."

Many of the A350's customers find the plane's nearly 10,000-mile range to be invaluable for ultra-long-haul routes connecting Asia with Europe and North America. However, TAP's route network is designed to connect Portugal with North America and the country's former colonies. For example, TAP's non-stop service between Lisbon, Portugal, and Sao Paulo, Brazil is one of the airline's bread and butter routes. It's also one of its longest routes at just over 10 hours while covering around 5,000 miles. Thus, the A330-900neo's 8,300 miles range will more than suffice.

And then there's the issue of money.

The A330-900neo lists for $296.4 million while the comparable A350-900 costs $21 million more per plane.

"We actually had an order for 12 A350s, but we needed more airplanes," Neeleman said.

The A330neo cockpit. Benjamin Zhang/Business Insider According to Neeleman, the A330neo boasted all of the fuel-saving features of the A350, including next-generation engines, new avionics, and optimized aerodynamics, but comes at a much lower price.

"It kind of did everything we needed based on the money we had to spend so we ended up going with the A330neo," he said.

In 2015, TAP replaced the A350 order with a deal for 14 A330neos.

The A330neo has netted 224 orders from airlines around the world headlined by Malaysian low-cost carrier AirAsia X as its largest customer with 66 on order. The A330neo's only US airline customer is Delta with 25 orders on the books.

Earlier this year, American Airlines and Hawaiian Airlines both canceled Airbus orders a favor of the Boeing Dreamliner. Hawaiian's defection to the Boeing camp is particularly painful for Airbus because it was the last airline with orders for the smaller variant of the A330neo, the A330-800neo.

Benjamin Zhang/Business Insider According to Hawaiian Airlines CEO Peter Ingram, the A330neo's lack of sale was one of the reasons why the carrier opted to go with the Boeing.